import { createStore, applyMiddleware, compose } from 'redux'
// 异步中间件
import thunk from 'redux-thunk'

import reducer from './reducers/userReducer'

// chrom 中的 f12看 redux扩展的信息
const composeEnhancers =
  typeof window === 'object' &&
    window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ ?
    window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__({}) : compose;

const enhancer = composeEnhancers(
  applyMiddleware(thunk)
);

export default createStore(reducer, enhancer)